These images show the low ground along the field over which the English
retreated.

The level allows one to get an idea of the terrain on the
day of the battle when a peak tide would have flooded the area.

This view across the retreat field shows
the low ground.

One
can conjecture that this terrain made it hard for the pursuing Norse troops
since there would have been a number of 'islands' between which an organised
army, and their leader Earl Morcar was still alive, could withdraw.